CN218437033U - Double-layer hydraulic hammer shell - Google Patents

Abstract

The utility model discloses a double-deck hydraulic hammer shell, including the upper flange, the inner tube, the urceolus, the lower flange, a plurality of deep floor, form the intermediate layer air cavity between the lateral surface of inner tube and the medial surface of urceolus, a plurality of deep floor fall into a plurality of gas channels of crossing with the intermediate layer air cavity, circumference is equipped with a plurality of gas pockets on the both ends lateral wall of inner tube, cross the gas pocket and cross the gas channel intercommunication, the circumference outside of upper flange bottom surface, the inboard respectively with the upper end of urceolus, the upper end of inner tube is connected, the circumference outside of lower flange top surface, the inboard respectively with the lower extreme of urceolus, the lower extreme of inner tube is connected. This hydraulic hammer shell adopts bilayer structure to establish the air passageway in the intermediate layer air cavity in bilayer structure, cross the air passageway and will hammer core top and the air intercommunication of below through the gas pocket, hit when avoiding causing the hammer core whereabouts and beat the energy impaired, improve the efficiency of beating of hammer core, bilayer tubular structure gives sound insulation noise reduction effect and better than the single-layer tubular structure noise insulation noise reduction effect, has reduced the noise pollution to the surrounding environment.

Description

Double-layer hydraulic hammer shell

Technical Field

The utility model relates to a hydraulic hammer technical field especially relates to a double-deck hydraulic hammer shell.

Background

The hydraulic hammer comprises a hydraulic pile hammer and a hydraulic mine hammer, the hydraulic pile hammer is used for pile driving construction, the hydraulic mine hammer is used for rock breaking operation construction, and the hydraulic hammer has the characteristic of high pile driving or rock breaking efficiency and can realize pile driving or rock breaking construction operation with large energy and high frequency; with the development of the building engineering towards the large-scale direction, the hydraulic hammer is more and more a preferred device for the construction of large pile foundations or earth and stone by taking the advantage of large striking energy; the hydraulic hammer is still driven to sink the pile to a predetermined depth or to reach a bearing stratum or break rock by the impact energy of the hammer core. Therefore, the hydraulic hammer still has great impact noise influence on the surrounding environment, and the larger the striking energy of the hydraulic hammer is, the greater the construction noise becomes. In the construction process, the hydraulic hammer and the anvil block can generate violent collision and vibration to generate huge impact sound, so that the physical health of constructors is influenced, and the surrounding environment is damaged. In addition, hydraulic hammer construction is more and more common in cities and towns with dense population, and control of equipment noise during construction is more and more strict, so that a new improved design is needed for increasing market demands of low-noise hydraulic hammers with noise reduction functions, noise of the hydraulic hammer is greatly reduced, and the hydraulic hammer can be suitable for pile foundation or rock breaking construction in the cities and towns with dense population.

In the prior art, the low-noise hydraulic pile hammer with the application number of CN202120978470.0, which is previously applied by the applicant, includes a hammer casing, a partition plate, a hammer core, an oil cylinder assembly, a noise reduction interlayer, and a noise reduction access cover, wherein the partition plate is installed in the hammer casing and divides an inner cavity of the hammer casing into a first cavity and a second cavity, a first access hole is formed in a cavity wall of the second cavity, the noise reduction access cover covers the first access hole, the noise reduction interlayer is adhered to an inner surface of the cavity wall of the second cavity, the hammer core is arranged in the second cavity, a first through hole is formed in the middle of the partition plate, the oil cylinder assembly is provided with a piston rod, and the oil cylinder assembly is installed in the first cavity and is connected with the hammer core through the piston rod passing through the first through hole. In addition, in order to improve the guidance of the hammer core during up-and-down movement of the existing hydraulic hammer, the radial outer side wall of the hammer core is basically abutted to the inner side wall of the hammer shell, and when the hammer core falls at a high speed, air below the hammer core is blocked due to lack of a discharge channel, so that the striking energy is damaged when the hammer core falls, and the striking efficiency of the hammer core is influenced.

Therefore, it is required to develop a hydraulic hammer case capable of improving the striking efficiency of the hammer core and improving the noise reduction effect.

Disclosure of Invention

An object of the utility model is to foretell not enough, a double-deck hydraulic hammer shell is provided, this hydraulic hammer shell adopts bilayer structure to establish air passage in the intermediate layer air cavity in bilayer structure, air passage passes through the air pocket with hammer core top and below air intercommunication, it is impaired to beat the energy when avoiding causing the hammer core whereabouts, improve beating efficiency of hammer core, double-deck tube structure gives sound insulation and falls the noise reduction effect and better than single-deck tube structure, the noise pollution to the surrounding environment has been reduced.

The technical scheme is as follows:

the utility model provides a double-deck hydraulic hammer shell, includes upper flange, inner tube, urceolus, lower flange, a plurality of length of reinforcement gusset, the inner tube is established in the urceolus, the lateral surface of inner tube with form the intermediate layer air cavity between the medial surface of urceolus, the lateral wall of inner tube is through a plurality of length of reinforcement gusset with the inside wall of urceolus is connected, and is a plurality of length of reinforcement gusset will the intermediate layer air cavity falls into a plurality of air channels of crossing, circumference is equipped with a plurality of air holes on the lateral wall of both ends of inner tube, cross the air hole with cross the air channel intercommunication, the circumference outside of upper flange bottom surface with the upper end of urceolus is connected, the circumference inboard of upper flange bottom surface with the upper end of inner tube is connected, the circumference outside of lower flange top surface with the lower extreme of urceolus is connected, the circumference inboard of lower flange top surface with the lower extreme of inner tube is connected.

The plurality of air passing holes comprise a plurality of upper air passing holes and a plurality of lower air passing holes, the upper air passing holes are located in the circumferential side wall of the upper end of the inner barrel, the lower air passing holes are located in the circumferential side wall of the lower end of the inner barrel, and the upper air passing holes and the lower air passing holes are respectively communicated with two ends of the air passing channel.

The air passing holes are circular or polygonal.

The pile driving device is characterized by further comprising two guide block mounting seats matched with the pile frame, wherein the two guide block mounting seats are respectively mounted at the upper end and the lower end of the outer side surface of the outer barrel.

The guide rail is installed on the outer side wall of the outer barrel, and two ends of the guide rail are respectively connected with the two guide block installation seats.

The top surface of the upper flange is provided with a plurality of first screw holes which are circumferentially and uniformly distributed on the top surface of the upper flange.

The bottom surface of the lower flange is provided with a plurality of second screw holes which are circumferentially and uniformly distributed on the bottom surface of the lower flange.

Still include the valve block body and with piston rod complex uide bushing, the centre of valve block body is equipped with the guiding hole, the uide bushing is installed in the guiding hole, the circumference outside of valve block body bottom surface with go up flange joint.

Still include a plurality of sealing washers, the centre of uide bushing is equipped with sealed through-hole, be equipped with a plurality of sealed recesses on the pore wall of sealed through-hole, it is a plurality of the sealing washer is installed respectively in a plurality of on the sealed recess.

The buffer seat is matched with the anvil block, and the buffer seat is installed on the bottom surface of the lower flange through the transition flange.

It should be noted that:

the foregoing "first and second" \ 8230, "does not denote any particular quantity or order, but rather is used merely to distinguish one name from another.

In the description of the present invention, it should be understood that the terms "upper" and "lower" are used as the terms of the orientation or the positional relationship based on the drawings, or the orientation or the positional relationship that the product of the present invention is usually placed when using, or the orientation or the positional relationship that the person skilled in the art usually understands, only for the convenience of describing the present invention and simplifying the description, but not for the indication or the suggestion that the device or the element that is referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore, should not be interpreted as the limitation of the present invention.

The direction indicated by the inner part refers to the direction towards the vertical central axis of the hammer shell of the hydraulic hammer.

The direction indicated by the outer direction refers to the direction far away from the vertical central axis of the hammer shell of the hydraulic hammer.

The advantages or principles of the invention are explained below:

1. the utility model provides a double-deck hydraulic hammer shell, it includes the upper flange, the inner tube, the urceolus, lower flange, a plurality of deep floor, deep floor divides into a plurality of air channels with intermediate layer air cavity between inner tube and the urceolus, and circumference is equipped with a plurality of air holes on the both ends lateral wall of inner tube, thereby circulate the upper air cavity above the hammer core and the lower air cavity below the hammer core, in use, when promoting the hammer core of hydraulic hammer, the air in the upper air cavity above the hammer core will flow into air channel through a plurality of upper air holes, and flow into the lower air cavity below the hammer core from a plurality of lower air holes below the air channel, thereby supplement the air in the upper air cavity above the hammer core into the lower air cavity below the hammer core, avoid the upper air cavity above the hammer core to be pressed, and hinder the promotion of hammer core, also avoid the air of lower air cavity below the hammer core to form the negative pressure simultaneously; when the hammer core of the hydraulic hammer falls, air in the lower air cavity below the hammer core flows into the air channel through the lower air passing holes and flows into the upper air cavity above the hammer core through the upper air passing holes above the air channel, so that the air in the lower air cavity below the hammer core is supplemented into the upper air cavity above the hammer core, the air in the lower air cavity below the hammer core is prevented from being pressurized and blocking the falling of the hammer core, the damage of striking energy when the hammer core falls is avoided, meanwhile, the air in the upper air cavity above the hammer core is prevented from forming negative pressure, and the striking efficiency of the hammer core is improved; when a hammer core strikes an anvil block of the hydraulic hammer, sound waves are generated in an inner cavity of the hammer shell, the sound waves are transmitted to a cylinder body of an inner cylinder as incident waves, part of the sound energy is reflected (reflected waves 1), one part of the sound energy is lost in the cylinder body of the inner cylinder, the other part of the sound energy is transmitted to an interlayer air cavity (transmitted waves 1) between the inner cylinder and an outer cylinder, the transmitted waves 1 are projected to the cylinder body of the outer cylinder after being attenuated by air in the interlayer air cavity, part of the sound energy is reflected (reflected waves 2), one part of the sound energy is lost in the cylinder body of the outer cylinder, and the other part of the sound energy is transmitted to the outside of the cylinder body of the outer cylinder (transmitted waves 2); this is exactly the process when the sound wave passes through double-deck barrel, because through reflection once more, loss and transmission, the sound wave is great decay occasionally outside the jingzhao barrel from the inner tube internal transmission, and the sound insulation performance can improve, consequently, double-deck barrel structure sound insulation noise reduction effect with than single-deck barrel structure sound insulation noise reduction effect good, reduced the noise pollution to the surrounding environment. This double-deck hydraulic hammer shell has both solved the hammer core and has risen or whereabouts and receive the air to obstruct, the impaired problem of energy, has still improved the sound-proof performance of hammer shell simultaneously, has also avoided among the prior art pasting to fall the interlayer and receive the problem of droing of shaking, the life of extension equipment.

2. The utility model also comprises two guide block mounting seats which are matched with the pile frame, when in use, the hammer guide block on the pile frame can be connected with the guide block mounting seat arranged on the outer cylinder through a bolt or a pin shaft, so that the hammer shell of the hydraulic hammer can be matched with the pile frame for use; the utility model also comprises a guide rail which is matched with the movable arm of the excavator, a sliding seat on the excavator can be arranged on the guide rail, and the sliding seat can slide up and down along the guide rail, and a hammer shell of the hydraulic hammer using the structure can be matched with the excavator for use; therefore, the hammer shell of the utility model can simultaneously satisfy the hydraulic pile hammer matched with the pile frame and also satisfy the hydraulic mine hammer matched with the excavator; the hydraulic hammer shell with the double-layer structure has the advantages of being capable of achieving multiple purposes of one hammer, compact in structure, high in strength, low in noise and the like, meeting the requirements of different working conditions, improving the utilization rate of equipment, reducing the production cost of the equipment and enlarging the application range of products.

3. The utility model discloses be equipped with a plurality of first screws on the top surface of last flange, the setting of first screw is convenient to be connected with the valve block body of hammer shell top.

4. The utility model discloses be equipped with a plurality of second screws on the bottom surface of flange down, the setting of second screw is convenient to be connected with the buffer seat of hammer shell below.

5. The utility model discloses still include the valve block body and with piston rod complex uide bushing, it is preferred, still establish a plurality of sealing washers in the uide bushing, improved guidance quality and leakproofness between hammer core piston rod and the hammer shell.

6. The utility model also comprises a transition flange and a buffer seat matched with the anvil block, which is convenient for the disassembly and assembly of the buffer seat; the use of different working conditions is met, the utilization rate of equipment is improved, the production cost of the equipment is reduced, and the application range of products is expanded.

Drawings

Fig. 1 is a schematic view of a three-dimensional appearance structure of a hammer shell of a double-layer hydraulic hammer according to an embodiment of the present invention.

Fig. 2 is a schematic sectional structure view of a hammer shell of a double-layer hydraulic hammer according to an embodiment of the present invention.

Fig. 3 isbase:Sub>A cross-sectional viewbase:Sub>A-base:Sub>A of fig. 2.

Fig. 4 is a cross-sectional view B-B of fig. 2.

Fig. 5 is a schematic structural view of the hammer core in an ascending state according to the embodiment of the present invention.

Fig. 6 is a schematic view of the structure of the falling state of the hammer core according to the embodiment of the present invention.

Fig. 7 is a schematic diagram of attenuation of sound reflection and transmission of a hammer case of a double-layer hydraulic hammer according to an embodiment of the present invention.

Description of the reference numerals:

10. the air-permeable sealing device comprises an upper flange, 11, a first screw hole, 20, an inner cylinder, 21, an air-permeable hole, 211, an upper air-permeable hole, 212, a lower air-permeable hole, 30, an outer cylinder, 40, a lower flange, 41, a second screw hole, 50, a reinforcing long rib plate, 51, an air-permeable channel, 61, a guide block mounting seat, 62, a guide rail, 71, a valve block body, 72, a guide sleeve, 73, a sealing ring, 81, a transition flange, 82, a buffer seat, 91, an upper air cavity, 92 and a lower air cavity.

Detailed Description

The following describes embodiments of the present invention in detail.

Referring to fig. 1 to 7, the utility model provides a double-deck hydraulic hammer shell, including last flange 10, inner tube 20, urceolus 30, lower flange 40, a plurality of deep floor 50, inner tube 20 is established in urceolus 30, form the intermediate layer air cavity between the lateral surface of inner tube 20 and the medial surface of urceolus 30, the lateral wall of inner tube 20 is connected with the inside wall of urceolus 30 through a plurality of deep floor 50, a plurality of deep floor 50 divide into a plurality of air channels 51 with the intermediate layer air cavity, circumference is equipped with a plurality of air holes 21 on the both ends lateral wall of inner tube 20, air holes 21 and air channels 51 intercommunication cross, the circumference outside of going up the flange 10 bottom surface is connected with the upper end of urceolus 30, the circumference inboard and the upper end of inner tube 20 of going up the flange 10 bottom surface are connected, the circumference outside and the lower extreme of urceolus 30 of lower flange 40 top surface are connected, the circumference inboard and the lower extreme of inner tube 20 of lower flange 40 top surface are connected. The plurality of air passing holes 21 include a plurality of upper air passing holes 211 and a plurality of lower air passing holes 212, the upper air passing holes 211 are located on the circumferential side wall of the upper end of the inner cylinder 20, the lower air passing holes 212 are located on the circumferential side wall of the lower end of the inner cylinder 20, and the upper air passing holes 211 and the lower air passing holes 212 are respectively communicated with two ends of the air passing channel 51. Preferably, the air passing holes 21 are circular or polygonal.

When the hammer core of the hydraulic hammer is lifted, air in the upper air cavity 91 above the hammer core flows into the air channels 51 through the upper air holes 211 and flows into the lower air cavity 92 below the hammer core from the lower air holes 212 below the air channels 51, so that the air in the upper air cavity 91 above the hammer core is supplemented into the lower air cavity 92 below the hammer core, the air in the upper air cavity 91 above the hammer core is prevented from being compressed to prevent the hammer core from being lifted, and meanwhile, the air in the lower air cavity 92 below the hammer core is prevented from forming negative pressure; referring to fig. 6, when the hammer core of the hydraulic hammer falls, the air in the lower air cavity 92 below the hammer core flows into the air passage 51 through the plurality of lower air passing holes 212, and flows into the upper air cavity 91 above the hammer core from the plurality of upper air passing holes 211 above the air passage 51, so that the air in the lower air cavity 92 below the hammer core is supplemented into the upper air cavity 91 above the hammer core, the air in the lower air cavity 92 below the hammer core is prevented from being compressed to block the falling of the hammer core, the impact energy damage caused when the hammer core falls is avoided, and the air in the upper air cavity 91 above the hammer core is also prevented from forming negative pressure, because the ventilation flow of the air passing holes 21 formed at the upper and lower ends of the hammer shell inner cylinder 20 is greater than the flow of the air discharged when the hammer core is lifted or falls, the resistance is greatly reduced in the lifting or falling process of the hammer core, and the impact efficiency of the hammer core is improved; meanwhile, the hammer shell adopts a double-layer structure of the inner cylinder and the outer cylinder 30 and is additionally provided with the reinforcing long rib plate 50, so that the strength of the hammer shell is increased, and the hydraulic hammer with the double-layer structure is not tight and is suitable for a single-acting hydraulic hammer and a double-acting hydraulic hammer with larger striking energy. The hydraulic hammer shell adopts a double-layer structure, referring to fig. 7, when a hammer core strikes an anvil block of the hydraulic hammer, sound waves are generated in an inner cavity of the hammer shell, the sound waves are transmitted to a cylinder body of an inner cylinder 20 as incident waves, part of sound energy is reflected (reflected waves 1), one part of the sound energy is lost in the cylinder body of the inner cylinder 20, the other part of the sound energy is transmitted to an interlayer air cavity (transmitted waves 1) between the inner cylinder 20 and an outer cylinder 30, the transmitted waves 1 are projected to the cylinder body of the outer cylinder 30 after being attenuated by air in the interlayer air cavity, part of the sound energy is reflected (reflected waves 2), one part of the sound energy is lost in the cylinder body of the outer cylinder 30, and the other part of the sound energy is transmitted to the outside of the cylinder body of the outer cylinder 30 (transmitted waves 2); this is the process when the sound wave passes through double-deck barrel, because through reflection once more, loss and transmission, the sound wave passes from the inner tube 20 in to the outer great decay of lobrachys bamboo occasionally, and sound insulation performance can improve, consequently, double-deck barrel structure sound insulation noise reduction effect with than single-deck barrel structure sound insulation noise reduction effect good, reduced the noise pollution to the surrounding environment. This double-deck hydraulic hammer shell has both solved the hammer core and has risen or the whereabouts is hindered by the air, the impaired problem of energy, has still improved the sound-insulating properties of hammer shell simultaneously, has also avoided the interlayer of making an uproar that falls who pastes among the prior art to receive the problem that shakes and drops, the life of extension equipment.

The double-layer hydraulic hammer shell further comprises two guide block installation seats 61 which are installed in a matched mode with the pile frame, a guide rail 62 which is installed in a matched mode with a movable arm of the excavator, a valve block body 71, a guide sleeve 72 which is matched with a piston rod, a plurality of sealing rings 73, a transition flange 81 and a buffer seat 82 which is matched with an anvil block, wherein the two guide block installation seats 61 are installed at the upper end and the lower end of the outer side face of the outer cylinder 30 respectively. The guide rail 62 is installed on the outer sidewall of the outer cylinder 30, and both ends of the guide rail 62 are connected to the two guide block installation seats 61, respectively. When in use, the hammer guide block on the pile frame can be connected with the guide block mounting seat 61 arranged on the outer cylinder 30 through a bolt or a pin shaft, so that the hammer shell of the hydraulic hammer can be matched with the pile frame for use; the sliding seat on the excavator can be arranged on the guide rail 62, the sliding seat can slide up and down along the guide rail 62, and the hammer shell of the hydraulic hammer with the structure can be matched with the excavator for use; therefore, the hammer shell of the utility model can simultaneously satisfy the hydraulic pile hammer matched with the pile frame and also satisfy the hydraulic mine hammer matched with the excavator; the hydraulic hammer shell with the double-layer structure has the advantages of being multipurpose, compact in structure, high in strength, low in noise and the like, meeting the requirements of different working conditions, improving the utilization rate of equipment, reducing the production cost of the equipment and enlarging the application range of products.

A plurality of first screw holes 11 are formed in the top surface of the upper flange 10, and the plurality of first screw holes 11 are circumferentially and uniformly distributed in the top surface of the upper flange 10. The first screw hole 11 is arranged to facilitate connection with the valve block body 71 above the hammer case.

A plurality of second screw holes 41 are formed in the bottom surface of the lower flange 40, and the plurality of second screw holes 41 are uniformly distributed on the bottom surface of the lower flange 40 in the circumferential direction. The second screw hole 41 is arranged to be conveniently connected with a buffer seat 82 below the hammer shell.

The middle of the valve block body 71 is provided with a guide hole, the guide sleeve 72 is arranged in the guide hole, and the circumferential outer side of the bottom surface of the valve block body 71 is connected with the upper flange 10. A sealing through hole is formed in the middle of the guide sleeve 72, a plurality of sealing grooves are formed in the hole wall of the sealing through hole, and a plurality of sealing rings 73 are respectively installed on the plurality of sealing grooves. The guidance and the sealing performance between the hammer core piston rod and the hammer shell are improved.

The cushion seat 82 is mounted on the bottom surface of the lower flange 40 by a transition flange 81. The buffer seat 82 is convenient to disassemble and assemble; the use of different working conditions is satisfied, the utilization rate of the equipment is improved, the production cost of the equipment is reduced, and the application range of the product is expanded.

The above are only specific embodiments of the present invention, and the protection scope of the present invention is not limited thereby; any replacement and improvement made on the basis of not violating the conception of the utility model belong to the protection scope of the utility model.

Claims (10)

1. The double-layer hydraulic hammer shell is characterized by comprising an upper flange, an inner cylinder, an outer cylinder, a lower flange and a plurality of reinforcing long rib plates, wherein the inner cylinder is arranged in the outer cylinder, an interlayer air cavity is formed between the outer side surface of the inner cylinder and the inner side surface of the outer cylinder, the outer side wall of the inner cylinder is connected with the inner side wall of the outer cylinder through the plurality of reinforcing long rib plates, the interlayer air cavity is divided into a plurality of air passing channels by the plurality of reinforcing long rib plates, a plurality of air passing holes are circumferentially formed in the side walls at two ends of the inner cylinder and communicated with the air passing channels, the circumferential outer side of the bottom surface of the upper flange is connected with the upper end of the outer cylinder, the circumferential inner side of the bottom surface of the upper flange is connected with the upper end of the inner cylinder, the circumferential outer side of the top surface of the lower flange is connected with the lower end of the outer cylinder, and the circumferential inner side of the top surface of the lower flange is connected with the lower end of the inner cylinder.

2. The double-deck hydraulic hammer case of claim 1, wherein the plurality of air passing holes include a plurality of upper air passing holes and a plurality of lower air passing holes, the upper air passing holes are located on the circumferential side wall of the upper end of the inner cylinder, the lower air passing holes are located on the circumferential side wall of the lower end of the inner cylinder, and the upper air passing holes and the lower air passing holes are respectively communicated with two ends of the air passing channel.

3. The double-deck hydraulic hammer housing of claim 1, wherein the venting holes are circular or polygonal.

4. The double-deck hydraulic hammer case of claim 1, further comprising two guide block mounting seats fitted to the pile frame, the two guide block mounting seats being respectively mounted on the upper end and the lower end of the outer side surface of the outer cylinder.

5. The double-deck hydraulic hammer case of claim 4, further comprising a guide rail mounted to cooperate with a boom of an excavator, wherein the guide rail is mounted to an outer sidewall of the outer cylinder, and both ends of the guide rail are respectively connected to the two guide block mounting seats.

6. The double-deck hydraulic hammer case of claim 1, wherein a plurality of first screw holes are provided in the top surface of the upper flange, and the plurality of first screw holes are evenly circumferentially distributed in the top surface of the upper flange.

7. The double-deck hydraulic hammer housing of claim 1, wherein a second plurality of threaded holes are provided in the bottom surface of the lower flange, the second plurality of threaded holes being circumferentially distributed on the bottom surface of the lower flange.

8. The double-deck hydraulic hammer case of any one of claims 1 to 7, further comprising a valve block body and a guide sleeve engaged with the piston rod, wherein a guide hole is formed in the middle of the valve block body, the guide sleeve is installed in the guide hole, and the circumferential outer side of the bottom surface of the valve block body is connected with the upper flange.

9. The double-deck hydraulic hammer case of claim 8, further comprising a plurality of sealing rings, wherein a sealing through hole is formed in the middle of the guide sleeve, a plurality of sealing grooves are formed in the wall of the sealing through hole, and the plurality of sealing rings are respectively mounted on the plurality of sealing grooves.

10. The double-deck hydraulic hammer housing of any one of claims 1 to 7, further comprising a transition flange and a cushioning seat for engagement with an anvil, the cushioning seat being mounted to the bottom surface of the lower flange by the transition flange.

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